Half to



' UNITED STATES Erica.

PATENT JOHN MOCONNELL, OF ERIE, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TOJULIUS R. DRODZEWVSKI, OF SAME PLACE.

PRINTERS QUOIN.

SPECIFICATION forming part of Letters Patent No. 326,438, datedSeptember 15, 1885.

Application filed January 14, 1855. (No model.)

To aZZ whom it may concern.-

Be it known that I, JOHN McCoNNELL, a citizen of the United States,residing at Erie, in the county of Erie and State of Pennsyl- Vania,have invented certain'new and useful Improvements in Printers Quoins;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference beinghadto the accompanying drawings, and to the letters of reference markedthereon, forming part of this specification.

My invention relates to improvements in printers quoins; and it consistsof the improvements hereinafter set forth and explained.

In the accompanying drawings, Figure 1 is a perspective view of myimproved quoin and a convenient wrench for operating the same. Fig. 2 isa top view of my improved quoin, the wrench being removed therefrom.Fig. 3 is a vertical cross-section of the same on the line 00 0c in Fig.2.

Like letters refer to like parts in all the figures.

In constructing'myimproved quoin I preferably make the outside sections,A B, thereof of unequal thickness, the section B being pref- 0 erably ofabout double the thickness of the section A. I also construct thesesections with their inner surfaces inclined from one end to the other ofthe quoin to fit the wedgeshaped central section, (J, as hereinafter setforth. I

The section A of this quoin is constructed without any notches in theupper edge thereof; The section B is constructed with notches b b in theupper edge thereof for the reception 0 of a wrench for operating thequoin.

The central section, 0, of the quoin is also constructed wedgeshaped,the taper of this section being equal to that of the inner faces of bothof the sections A and B, so that when 5 the sections A, B, and O areplaced together, as shown, the outer sides of the sections A and B areat all points parallel with each other.

The central section, 0, is provided with notches c c, &c., for thereception of a wrench for operating the quoin.

The central sect-ion, O, is provided in the lower portion thereof with alongitudinal slot,

E, extending nearly the whole length thereof, and also above the slot Ewith longitudinal fins F F on either side thereof, which slide inlongitudinal grooves G G in the side sections,

A B, of the quoin.

The sections A, B, and O of the quoin are held together by means of aloose rivet, H, which passes through the slot E in the central 6csection, 0, into the countersunk holes I I in the side sections, A B,said rivet H being slightly headed over at its ends, so that it cannotbe withdrawn from the holes I I. This rivet is preferably. constructedof a fiat or square bar of metal, which fits the slot E and the holes II sufficiently 'tightto prevent the sections of the quoin from beingswung around thereon, and at the same time retains the sections of thequoin in the proper position rela- 7o tively to each other whilepermitting the free longitudinal movement of the section 0 between thesections A B. This rivet H is long enough, so that the heads of the samewill not come in contact with the bottoms of the coun- 7 5 tersunk holesI I until the quoin is extended to its greatest width.

The lower edge of the central section, (I, is cut away at 0 throughoutits entire length, so that when the quoin is placed upon an impos- 8oing-stone it is entirely supported by the fins F F operating in thegrooves G G in the side sections of the quoin, and will not touch thestone in its longitudinal movement forward and backward, thus entirelypreventing the moving or scratching of the stone in the tightening up orloosening of the quoin.

In operating my improved quoin it is shoved together into the positionshownin Fig. 2, and placed between the chase and sicle'stick of theform, a suitable wrench is then placed in the notches b and 0,respectively, and by turning the wrench, as shown in Fig. 1, the centralsection, 0, of the quoin is forced longitudinally between the sidesections, A and B, as shown in Fig. 1, until the quoin is tightenedsufficiently in place, when the wrench can be removed therefrom. Toloosen the quoin the wrench is inserted in the notches in the samemanner and turned in the opposite direction, I

shoving the central section, 0, back between the sections A and B,thereby reducing the width of the quoin and releasing it.

Having thus fully described my invention, I do not desire to broadlyclaim a printers quoin constructed of three sections provided I in theapplication of Drodzewski and McConnell, hereinbefore referred to. 20

In this quoin, however, both the slot and the guides are on the centralsection of the quoin, the guides in this'instance being above the slotand operating to prevent any force applied to the upper edge of thecentral section. 0, from closing the slot E together. The centralsection, 0, being also made vertically narrower than the outer sections,A and B, is held up by these guides, so that it will not touch 'or marthe imposing-stone upon which it is used in making up a form. Therefore,

What I claim as new, and desire to secure by Letters Patent of theUnited States, is-

1. The combination, in a printers quoin, of the three sections,substantially as shown, connected together by a loose rivet, the centralof which sections rests and moves longitudinally upon slides or guideson the outside sec tions, so that in its longitudinal movement it v isheld up ofi of and does not touch the'i mf posing-stone, substantiallyas and for the purpose set forth. 7 v 1 2. The combination, in aprinters quoin, of two outside sections provided with countersunkrivet-holes and having their inner faces longitudinally inclined andprovided with longitudinal grooves, substantially as shown, with acentral wedge-shaped section having a longitudinal slot therein andlongitudinal fins on either side thereof above said slot, and-having thelower edge thereof cut away, substantially as shown, and a loose rivetpassing through the countersunk rivetholes in the outside sections andthrough the slot in the central section, substantially as and for thepurpose set forth.

3. The combination, in a printers quoin, of an outside section. A,provided with the countersunk rivet hole I and having the inner facethereof longitudinally inclined and rovided with the groove G,substantially as shown, and an outside section, B, provided with notchesb b in the upper edge thereof and the countersunk rivet hole I, andhaving the inner face thereof longitudinally incline and provided withthe groove G, substantially as shown, with the loose rivet H and thecentralwedge-shaped section, 0, provided with notches cin the upper edgethereof and havingthe longitudinal slot E therein and the fins F F abovesaid slot and the lower edge thereof cut away at a, substantially asshown and set forth.

In testimony whereof I aflix my signature in presence of two witnesses.JOHN MoOONN ELL.

Witnesses:

EDWIN WALKER, H. M. STURGEON.

